Java tutorial
/** * This file Copyright (c) 2008-2012 Magnolia International * Ltd. (http://www.magnolia-cms.com). All rights reserved. * * * This file is dual-licensed under both the Magnolia * Network Agreement and the GNU General Public License. * You may elect to use one or the other of these licenses. * * This file is distributed in the hope that it will be * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the * implied warranty of MERCHANTABILITY or FITNESS FOR A * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT. * Redistribution, except as permitted by whichever of the GPL * or MNA you select, is prohibited. * * 1. For the GPL license (GPL), you can redistribute and/or * modify this file under the terms of the GNU General * Public License, Version 3, as published by the Free Software * Foundation. You should have received a copy of the GNU * General Public License, Version 3 along with this program; * if not, write to the Free Software Foundation, Inc., 51 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * 2. For the Magnolia Network Agreement (MNA), this file * and the accompanying materials are made available under the * terms of the MNA which accompanies this distribution, and * is available at http://www.magnolia-cms.com/mna.html * * Any modifications to this file must keep this entire header * intact. * */ package info.magnolia.debug; import info.magnolia.cms.filters.AbstractMgnlFilter; import java.io.IOException; import java.util.Enumeration; import java.util.Iterator; import javax.servlet.FilterChain; import javax.servlet.ServletException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.lang.StringUtils; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * A Filter which dumps the headers for the request and the response. The response is therefore wrapped. * @author philipp * @version $Id$ */ public class DumpHeadersFilter extends AbstractMgnlFilter { private static final Logger log = LoggerFactory.getLogger("info.magnolia.debug"); private long count = 0; @Override public void doFilter(HttpServletRequest request, HttpServletResponse response, FilterChain chain) throws IOException, ServletException { long nr = count++; LoggingResponse wrappedResponse = new LoggingResponse(response); log.info("{} uri: {}", Long.toString(nr), request.getRequestURI()); log.info("{} session: {}", Long.toString(nr), Boolean.valueOf(request.getSession(false) != null)); StringBuffer params = new StringBuffer(); for (Enumeration paramEnum = request.getParameterNames(); paramEnum.hasMoreElements();) { String name = (String) paramEnum.nextElement(); params.append(name).append(" = ").append(StringUtils.join(request.getParameterValues(name), ",")); if (paramEnum.hasMoreElements()) { params.append("; "); } } log.info("{} parameters: {}", Long.toString(nr), params); log.info("{} method: {}", Long.toString(nr), request.getMethod()); for (Enumeration en = request.getHeaderNames(); en.hasMoreElements();) { String name = (String) en.nextElement(); log.info("{} header: {}={}", new String[] { String.valueOf(nr), name, request.getHeader(name) }); } chain.doFilter(request, wrappedResponse); log.info("{} response status: {}", Long.toString(nr), Integer.toString(wrappedResponse.getStatus())); log.info("{} response length: {}", Long.toString(nr), Long.toString(wrappedResponse.getLength())); log.info("{} response mime type: {}", Long.toString(nr), wrappedResponse.getContentType()); for (Iterator iter = wrappedResponse.getHeaders().keySet().iterator(); iter.hasNext();) { String name = (String) iter.next(); log.info(request.getRequestURI() + " response: " + name + " = " + wrappedResponse.getHeaders().get(name)); } } }